The invention belongs to the technical field of auxiliary driving control of double-motor four-wheel-drive vehicles, and particularly relates to an auxiliary driving force on-off control method of a timely four-wheel-drive vehicle. If any one of the following conditions exists or multiple conditions exist at the same time, the vehicle is switched to run in a four-wheel drive mode; wherein the six conditions are vehicle overspeed driving; the wheel speed acceleration gradient is greater than a threshold; wheels are in a turning working condition; brake failure; tire burst of the wheels; when the vehicle is in a slipping condition, the wheel speed information is judged to be in an effective state, the wheel speed difference is larger than a threshold value, and the wheel speed acceleration is larger than the threshold value; various working conditions can be effectively recognized, auxiliary drive power transmission is cut off under the working condition of the two-drive mode, drag torque is prevented from being generated, and therefore the dynamic property of the vehicle is improved, the cruising ability of the vehicle is improved, on-off of auxiliary drive force transmission is more reliably controlled, and occupied axial space is reduced.
本发明属于双电机四驱车辆辅驱控制技术领域,具体涉及一种适时四驱车辆的辅驱动力通断控制方法;若以下情况存在任意一种或同时存在多种,则车辆切换为四驱模式行驶;其中六种情况为车辆超速行驶;轮速加速度梯度大于阈值;车轮处于转弯工况;刹车失灵;车轮爆胎;车辆处于打滑工况,即轮速信息判断为有效状态,同时轮速差大于阈值,且轮速加速度大于阈值;本发明能够有效识别各种工况,并在两驱模式的工况下断开辅驱的动力传输,防止产生拖曳扭矩,从而提升车辆的动力性,提高车辆的续航能力,更可靠的控制辅驱动力传输的通断,减少轴向空间的占用。
Auxiliary driving force on-off control method for timely four-wheel-drive vehicle
一种适时四驱车辆的辅驱动力通断控制方法
2024-09-10
Patent
Electronic Resource
Chinese
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
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